Yeah you will still get the concats, which you really don't want to keep
(those are really expensive). We typically write logging like this:
if (DEBUG) Log.v("foo", "this is something: " + something);
Then when DEBUG is false the entire statement, including string
concatenation, is stripped.
On Fri, Oct 2, 2009 at 9:17 AM, Dan Sherman <impact...@gmail.com> wrote:
> I would imagine it does the string concat and then disregards it. It would
> concat, pass the final string to the function, fail the if, return, and
> discard the string...
>
> - Dan
>
>
> On Fri, Oct 2, 2009 at 9:31 AM, jsdf <jasons...@gmail.com> wrote:
>
>>
>> Hi all,
>>
>> I have been using the following conventions for my applications:
>>
>> - I define a static log(String msg) function centrally as:
>> public static void log(String msg) {
>> if (LOG) Log.v(msg);
>> }
>>
>> - While debugging, LOG is true. For production, LOG is false.
>>
>> - Throughout the code, I will then log with functions like:
>> MainApp.log("This is a logged message, variable a="+a);
>>
>> My question is, if I set LOG to false, will the compiler recognize
>> that the entire log function is useless and not even perform the
>> string concatenation? Or, will it perform the string concatenation,
>> but then immediately disregard the results? Obviously, I prefer the
>> former (fewer ops = better), but I don't know how to check for this.
>>
>> Thanks,
>> jsdf
>>
>>
>
> >
>
--
Dianne Hackborn
Android framework engineer
hack...@android.com
Note: please don't send private questions to me, as I don't have time to
provide private support, and so won't reply to such e-mails. All such
questions should be posted on public forums, where I and others can see and
answer them.
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